p-Chlorothiophenol → HCID 58579932, compound

Participants

Reaction Steps

To a solution of tert-butyl 4-(hydroxymethyl)-6-oxopyridazine-1(6H)-carboxylate Part B (185 mg, 0.82 mmol) and Et3N (0.34 mL, 2.45 mmol) in CH2Cl2 (5 mL) under nitrogen at −10° C. was added a solution of methanesulfonyl chloride (0.076 mL, 0.98 mmol) in CH2Cl2 (2 mL). After stirring at RT for 15 min, 4-chlorobenzenethiol (355 mg, 2.45 mmol) was added to the reaction and the stirring at RT continued for 3 days. Following removal of the volatiles under vacuum, the crude product was purified by flash chromatography (silica gel/hexane-EtOAc 100:0 to 50:50 gradient, using LC-MS to identify fractions containing the desired product) to afford tert-butyl 4-((4-chlorophenylthio)methyl)-6-oxopyridazine-1(6H)-carboxylate 7C (137 mg, 47% yield).

Provenance & Evidence